Results 71 to 80 of about 1,904 (164)

Edge-coloring vertex-weightings of graphs

open access: yes, 2021
Summary: Let \(G = (V (G), E(G))\) be a simple, finite and undirected graph of order \(n\). A \(k\)-vertex weighting of a graph \(G\) is a mapping \(w : V (G) \to \{1, \dots, k\}\). A \(k\)-vertex weighting induces an edge labeling \(f_w : E(G) \to \mathbb{N}\) such that \(f_w(uv) = w(u) + w(v)\). Such a labeling is called an edge-coloring \(k\)-vertex
Shiua, Wai Chee   +2 more
openaire   +2 more sources

On Closed Modular Colorings of Trees

open access: yesDiscussiones Mathematicae Graph Theory, 2013
Two vertices u and v in a nontrivial connected graph G are twins if u and v have the same neighbors in V (G) − {u, v}. If u and v are adjacent, they are referred to as true twins; while if u and v are nonadjacent, they are false twins.
Phinezy Bryan, Zhang Ping
doaj   +1 more source

Total dominator chromatic number of some operations on a graph

open access: yesBulletin of Computational Applied Mathematics, 2018
Let G be a simple graph. A total dominator coloring of G is a proper coloring of the vertices of G in which each vertex of the graph is adjacent to every vertex of some color class.
Nima Ghanbari, Saeid Alikhani
doaj  

THE LOCATING RAINBOW CONNECTION NUMBERS OF LOLLIPOP AND BARBELL GRAPHS

open access: yesBarekeng
The concept of the locating rainbow connection number of a graph is an innovation in graph coloring theory that combines the concepts of rainbow vertex coloring and partition dimension on graphs.
Ariestha Widyastuty Bustan   +4 more
doaj   +1 more source

The b$_q$-coloring of graphs [PDF]

open access: yesDiscrete Mathematics Letters, 2023
Brice Effantin
doaj   +1 more source

Vertex coloring of graphs via phase dynamics of coupled oscillatory networks. [PDF]

open access: yesSci Rep, 2017
Parihar A   +4 more
europepmc   +1 more source

Interval Vertex-Coloring of a Graph With Forbidden Colors

open access: yesDiscrete Mathematics, 1989
The classical model of coloring the vertices of a graph with single colors so that no two adjacent vertices are colored the same is too limited to be useful in many practical applications. Therefore one must consider more general notions of graph coloring and this article is devoted to one of such generalizations.
openaire   +2 more sources

Automatically generated algorithms for the vertex coloring problem. [PDF]

open access: yesPLoS One, 2013
Contreras Bolton C, Gatica G, Parada V.
europepmc   +1 more source

Finite Vertex-Colored Ultrahomogeneous Oriented Graphs

open access: yes
A relational structure R is ultrahomogeneous if every isomorphism of finite induced substructures of R extends to an automorphism of R. We classify the ultrahomogeneous finite binary relational structures with one asymmetric binary relation and arbitrarily many unary relations.
Irene Heinrich   +2 more
openaire   +2 more sources

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